Finding the Fourth Proportional to 30,971, 42,740.34 and 16,824.08

Step by Step Solution

1. Step 1: Write the proportion equation
   30,971 : 42,740.34 = 16,824.08 : x
2. Step 2: Convert to fraction form
   30,971/42,740.34 = 16,824.08/x
3. Step 3: Cross multiply
   30,971x = 42,740.34 × 16,824.08
4. Step 4: Simplify right side
   30,971x = 719,066,899.39
5. Step 5: Solve for x
   x = 719,066,899.39/30,971
6. Step 6: Final answer
   x = 23,217.43